A mobile billboard will be cruising the Des Moines area from Thursday through Monday on behalf of the National Committee to Preserve Social Security and Medicare.

The group, which claims 36,000 members and supporters in Iowa, says it wants to remind Republican presidential candidates seeking support in their Iowa Caucus campaigns that a majority of Americans oppose proposals to privatize Social Security and Medicare. A kick-off for the billboard campaign will be held at 10:30 a.m. Thursday at the offices of Iowa Citizens for Community Improvement, 2001 Forest Ave., Des Moines.